Photo credits

The ocean photos in this gradebook come from Wikimedia Commons, used under the licenses below. Thank you to the photographers.

• Green sea turtle
  David Vogel · Public domain · source
• Two dolphins jumping
  CaptainDarwin · CC BY-SA 4.0 · source
• Ocean Beach at sunset, San Diego
  Alton (English Wikipedia) · Public domain · source
• Wild sea otter
  Rennett Stowe · CC BY 2.0 · source
• California sea lions
  Dennis G. Jarvis · CC BY-SA 2.0 · source
• Sandy beach waves, Honolulu
  Daniel Ramirez · CC BY 2.0 · source